[Windows] Fix for Multiple Tabs Being Selected in WinUI TabbedPage#33312
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Pull request overview
This PR fixes a Windows-specific issue where multiple tabs can appear selected simultaneously in a WinUI TabbedPage. The root cause is that the NavigationView's SelectedItem property is not cleared when the TabbedPage disappears, causing the selection indicator from the previous page to persist visually.
Key Changes
- Core Fix: Explicitly sets
_navigationView.SelectedItem = nullin theOnTabbedPageDisappearingmethod to clear selection state - UI Test: Adds comprehensive UI test that reproduces the issue by creating a FlyoutPage with nested TabbedPages and navigating between them
- Test Validation: Includes screenshot verification to ensure only one tab appears selected after navigation
Reviewed changes
Copilot reviewed 3 out of 5 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
src/Controls/src/Core/TabbedPage/TabbedPage.Windows.cs |
Adds _navigationView.SelectedItem = null to clear selection when TabbedPage disappears, preventing multiple tabs from appearing selected |
src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31799.cs |
Implements NUnit UI test to verify TabbedPage selection behavior across platforms with screenshot verification |
src/Controls/tests/TestCases.HostApp/Issues/Issue31799.cs |
Creates test page with FlyoutPage containing TabbedPages to reproduce the multiple selection issue |
src/Controls/tests/TestCases.iOS.Tests/snapshots/ios/VerifyTabbedPageDoesNotHaveMultipleTabsSelected.png |
iOS snapshot baseline for visual verification |
src/Controls/tests/TestCases.Android.Tests/snapshots/android/VerifyTabbedPageDoesNotHaveMultipleTabsSelected.png |
Android snapshot baseline for visual verification |
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| #if TEST_FAILS_ON_CATALYST // Issue Link : https://github.com/dotnet/maui/issues/32900 | ||
| using NUnit.Framework; | ||
| using UITest.Appium; | ||
| using UITest.Core; | ||
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| namespace Microsoft.Maui.TestCases.Tests.Issues; | ||
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| public class Issue31799 : _IssuesUITest | ||
| { | ||
| public Issue31799(TestDevice device) : base(device) | ||
| { | ||
| } | ||
|
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| public override string Issue => "WinUI TabbedPage can have multiple tabs selected"; | ||
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| [Test] | ||
| [Category(UITestCategories.TabbedPage)] | ||
| public void VerifyTabbedPageDoesNotHaveMultipleTabsSelected() | ||
| { | ||
| App.WaitForElement("SelectedTabLabel"); | ||
| App.TapTab("Unselected Tab"); | ||
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| App.WaitForElement("CreateTabbedPageButton"); | ||
| App.Tap("CreateTabbedPageButton"); | ||
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| App.WaitForElement("NewSelectedTabLabel"); | ||
| VerifyScreenshot(); | ||
| } | ||
| } | ||
| #endif No newline at end of file |
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According to the UI Testing Guidelines, the test is wrapped in a platform-specific conditional compilation directive for MacCatalyst. However, the issue description states this is a Windows-specific fix, and the test should ideally run on Windows where the bug exists. The directive #if TEST_FAILS_ON_CATALYST suggests the test fails on MacCatalyst, but there's no explanation why. Consider adding a comment explaining why the test is disabled on MacCatalyst and whether it should also be conditionally enabled only for Windows if it's a Windows-specific issue.
| public void VerifyTabbedPageDoesNotHaveMultipleTabsSelected() | ||
| { | ||
| App.WaitForElement("SelectedTabLabel"); | ||
| App.TapTab("Unselected Tab"); |
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The App.TapTab method is being used, but this is not a standard method available in the Appium UITest framework. The standard approach for interacting with tabs in TabbedPage should use App.Tap with the tab title or a specific AutomationId. If TapTab is a custom extension method, it should be verified that it works correctly across all platforms, especially since this test is meant to run on multiple platforms.
Suggested change
| App.TapTab("Unselected Tab"); | |
| App.Tap("Unselected Tab"); |
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Could you please try the AI's suggestions?
kubaflo
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The test if succeeding without a fix - could you please verify?
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|
🚀 Dogfood this PR with:
curl -fsSL https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.sh | bash -s -- 33312Or
iex "& { $(irm https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.ps1) } 33312" |
Contributor
Author
@kubaflo , The gate reported a failure; however, I verified the behavior locally. Without the fix, two tabs are selected simultaneously, whereas with the fix, only one tab is selected as expected. Screenshots are shared below for reference.
Regarding the test suggestion, the navigation round-trip feedback has been incorporated. The test now navigates to the new TabbedPage, then navigates back, and verifies that the original TabbedPage shows only one selected tab. |
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|
/azp run maui-pr-uitests |
|
Azure Pipelines successfully started running 1 pipeline(s). |
This was referenced Apr 15, 2026
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Looks like the test is failing
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🤖 AI Summary
📊 Review Session —
|
| Test | Without Fix (expect FAIL) | With Fix (expect PASS) |
|---|---|---|
🖥️ Issue31799 Issue31799 |
✅ FAIL — 573s | ❌ FAIL — 464s |
🔴 Without fix — 🖥️ Issue31799: FAIL ✅ · 573s
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Test run for D:\a\1\s\artifacts\bin\Controls.TestCases.WinUI.Tests\Debug\net10.0\Controls.TestCases.WinUI.Tests.dll (.NETCoreApp,Version=v10.0)
VSTest version 18.0.1 (x64)
Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
D:\a\1\s\artifacts\bin\Controls.TestCases.WinUI.Tests\Debug\net10.0\Controls.TestCases.WinUI.Tests.dll
NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in D:\a\1\s\artifacts\bin\Controls.TestCases.WinUI.Tests\Debug\net10.0\Controls.TestCases.WinUI.Tests.dll
NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 4/27/2026 12:20:44 PM FixtureSetup for Issue31799(Windows)
>>>>> 4/27/2026 12:20:53 PM VerifyTabbedPageDoesNotHaveMultipleTabsSelected Start
>>>>> 4/27/2026 12:20:58 PM VerifyTabbedPageDoesNotHaveMultipleTabsSelected Stop
>>>>> 4/27/2026 12:20:58 PM Log types:
Failed VerifyTabbedPageDoesNotHaveMultipleTabsSelected [6 s]
Error Message:
VisualTestUtils.VisualTestFailedException :
Baseline snapshot not yet created: D:\a\1\s\artifacts\bin\Controls.TestCases.WinUI.Tests\Debug\net10.0\snapshots\windows\VerifyOriginalTabbedPageDoesNotHaveMultipleTabsSelected.png
Ensure new snapshot is correct: D:\a\1\a\Controls.TestCases.Shared.Tests\snapshots-diff\windows\VerifyOriginalTabbedPageDoesNotHaveMultipleTabsSelected.png
and if it is, push a change to add it to the 'snapshots' directory.
See test attachment or download the build artifacts to get the new snapshot file.
More info: https://aka.ms/visual-test-workflow
Stack Trace:
at Microsoft.Maui.TestCases.Tests.Issues.Issue31799.VerifyTabbedPageDoesNotHaveMultipleTabsSelected() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31799.cs:line 37
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
NUnit Adapter 4.5.0.0: Test execution complete
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0)
[xUnit.net 00:00:00.11] Discovering: Controls.TestCases.WinUI.Tests
[xUnit.net 00:00:00.43] Discovered: Controls.TestCases.WinUI.Tests
Total tests: 1
Failed: 1
Test Run Failed.
Total time: 34.2029 Seconds
🟢 With fix — 🖥️ Issue31799: FAIL ❌ · 464s
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Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:05:46.19
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All projects are up-to-date for restore.
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Test run for D:\a\1\s\artifacts\bin\Controls.TestCases.WinUI.Tests\Debug\net10.0\Controls.TestCases.WinUI.Tests.dll (.NETCoreApp,Version=v10.0)
VSTest version 18.0.1 (x64)
Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
D:\a\1\s\artifacts\bin\Controls.TestCases.WinUI.Tests\Debug\net10.0\Controls.TestCases.WinUI.Tests.dll
NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in D:\a\1\s\artifacts\bin\Controls.TestCases.WinUI.Tests\Debug\net10.0\Controls.TestCases.WinUI.Tests.dll
NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 4/27/2026 12:28:29 PM FixtureSetup for Issue31799(Windows)
>>>>> 4/27/2026 12:28:37 PM VerifyTabbedPageDoesNotHaveMultipleTabsSelected Start
>>>>> 4/27/2026 12:28:42 PM VerifyTabbedPageDoesNotHaveMultipleTabsSelected Stop
>>>>> 4/27/2026 12:28:42 PM Log types:
Failed VerifyTabbedPageDoesNotHaveMultipleTabsSelected [5 s]
Error Message:
VisualTestUtils.VisualTestFailedException :
Baseline snapshot not yet created: D:\a\1\s\artifacts\bin\Controls.TestCases.WinUI.Tests\Debug\net10.0\snapshots\windows\VerifyOriginalTabbedPageDoesNotHaveMultipleTabsSelected.png
Ensure new snapshot is correct: D:\a\1\a\Controls.TestCases.Shared.Tests\snapshots-diff\windows\VerifyOriginalTabbedPageDoesNotHaveMultipleTabsSelected.png
and if it is, push a change to add it to the 'snapshots' directory.
See test attachment or download the build artifacts to get the new snapshot file.
More info: https://aka.ms/visual-test-workflow
Stack Trace:
at Microsoft.Maui.TestCases.Tests.Issues.Issue31799.VerifyTabbedPageDoesNotHaveMultipleTabsSelected() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31799.cs:line 37
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
NUnit Adapter 4.5.0.0: Test execution complete
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0)
[xUnit.net 00:00:00.12] Discovering: Controls.TestCases.WinUI.Tests
[xUnit.net 00:00:00.33] Discovered: Controls.TestCases.WinUI.Tests
Total tests: 1
Failed: 1
Test Run Failed.
Total time: 28.3037 Seconds
⚠️ Issues found
- ❌ Issue31799 FAILED with fix (should pass)
VerifyTabbedPageDoesNotHaveMultipleTabsSelected [5 s]VisualTestUtils.VisualTestFailedException : Baseline snapshot not yet created: D:\a\1\s\artifacts\bin\Controls.TestCases.WinUI.Tests\Debug\net10.0\snapshots\windows\VerifyOriginalTabbedPageDoesNotHa...
📁 Fix files reverted (1 files)
src/Controls/src/Core/TabbedPage/TabbedPage.Windows.cs
🧪 UI Tests — Category Detection
Detected UI test categories: TabbedPage
📊 Review Session — faba441 · Updated the test case · 2026-04-24 15:42 UTC
🚦 Gate — Test Before & After Fix
Gate Result: ❌ FAILED
Platform: ANDROID · Base: main · Merge base: eb0b82fe
| Test | Without Fix (expect FAIL) | With Fix (expect PASS) |
|---|---|---|
🖥️ Issue31799 Issue31799 |
❌ PASS — 1786s | ✅ PASS — 557s |
🔴 Without fix — 🖥️ Issue31799: PASS ❌ · 1786s
(truncated to last 15,000 chars)
DB0010: at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.RunInstall() [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
Build FAILED.
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: Mono.AndroidTools.InstallFailedException: Unexpected install output: cmd: Failure calling service package: Broken pipe (32) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass105_0.<InstallPackage>b__0(Task`1 t) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: --- End of stack trace from previous location --- [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: --- End of stack trace from previous location --- [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.RunInstall() [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
0 Warning(s)
1 Error(s)
Time Elapsed 00:17:18.91
* daemon not running; starting now at tcp:5037
* daemon started successfully
Determining projects to restore...
All projects are up-to-date for restore.
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Graphics -> /home/vsts/work/1/s/artifacts/bin/Graphics/Debug/net10.0-android36.0/Microsoft.Maui.Graphics.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Essentials -> /home/vsts/work/1/s/artifacts/bin/Essentials/Debug/net10.0-android36.0/Microsoft.Maui.Essentials.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Core -> /home/vsts/work/1/s/artifacts/bin/Core/Debug/net10.0-android36.0/Microsoft.Maui.dll
Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Maps -> /home/vsts/work/1/s/artifacts/bin/Maps/Debug/net10.0-android36.0/Microsoft.Maui.Maps.dll
Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.Core/Debug/net10.0-android36.0/Microsoft.Maui.Controls.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Foldable -> /home/vsts/work/1/s/artifacts/bin/Controls.Foldable/Debug/net10.0-android36.0/Microsoft.Maui.Controls.Foldable.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Xaml -> /home/vsts/work/1/s/artifacts/bin/Controls.Xaml/Debug/net10.0-android36.0/Microsoft.Maui.Controls.Xaml.dll
Microsoft.AspNetCore.Components.WebView.Maui -> /home/vsts/work/1/s/artifacts/bin/Microsoft.AspNetCore.Components.WebView.Maui/Debug/net10.0-android36.0/Microsoft.AspNetCore.Components.WebView.Maui.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.Maps/Debug/net10.0-android36.0/Microsoft.Maui.Controls.Maps.dll
Controls.TestCases.HostApp -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Controls.TestCases.HostApp.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Graphics -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Graphics.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Essentials -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Essentials.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Core -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.dll
Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Maps.dll
Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Maps.dll
Microsoft.AspNetCore.Components.WebView.Maui -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.AspNetCore.Components.WebView.Maui.dll
Controls.Xaml -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Xaml.dll
Controls.Foldable -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Foldable.dll
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:09:05.74
Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
Broadcast completed: result=0
Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
Broadcast completed: result=0
Determining projects to restore...
Restored /home/vsts/work/1/s/src/TestUtils/src/VisualTestUtils/VisualTestUtils.csproj (in 1.24 sec).
Restored /home/vsts/work/1/s/src/TestUtils/src/UITest.NUnit/UITest.NUnit.csproj (in 1.08 sec).
Restored /home/vsts/work/1/s/src/TestUtils/src/UITest.Core/UITest.Core.csproj (in 111 ms).
Restored /home/vsts/work/1/s/src/TestUtils/src/UITest.Appium/UITest.Appium.csproj (in 1.39 sec).
Restored /home/vsts/work/1/s/src/TestUtils/src/VisualTestUtils.MagickNet/VisualTestUtils.MagickNet.csproj (in 4.71 sec).
Restored /home/vsts/work/1/s/src/TestUtils/src/UITest.Analyzers/UITest.Analyzers.csproj (in 2.38 sec).
Restored /home/vsts/work/1/s/src/Controls/tests/CustomAttributes/Controls.CustomAttributes.csproj (in 5 ms).
Restored /home/vsts/work/1/s/src/Controls/tests/TestCases.Android.Tests/Controls.TestCases.Android.Tests.csproj (in 2.15 sec).
5 of 13 projects are up-to-date for restore.
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Graphics -> /home/vsts/work/1/s/artifacts/bin/Graphics/Debug/net10.0/Microsoft.Maui.Graphics.dll
Controls.CustomAttributes -> /home/vsts/work/1/s/artifacts/bin/Controls.CustomAttributes/Debug/net10.0/Controls.CustomAttributes.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Essentials -> /home/vsts/work/1/s/artifacts/bin/Essentials/Debug/net10.0/Microsoft.Maui.Essentials.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Core -> /home/vsts/work/1/s/artifacts/bin/Core/Debug/net10.0/Microsoft.Maui.dll
Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.Core/Debug/net10.0/Microsoft.Maui.Controls.dll
UITest.Core -> /home/vsts/work/1/s/artifacts/bin/UITest.Core/Debug/net10.0/UITest.Core.dll
VisualTestUtils -> /home/vsts/work/1/s/artifacts/bin/VisualTestUtils/Debug/netstandard2.0/VisualTestUtils.dll
UITest.NUnit -> /home/vsts/work/1/s/artifacts/bin/UITest.NUnit/Debug/net10.0/UITest.NUnit.dll
VisualTestUtils.MagickNet -> /home/vsts/work/1/s/artifacts/bin/VisualTestUtils.MagickNet/Debug/netstandard2.0/VisualTestUtils.MagickNet.dll
UITest.Appium -> /home/vsts/work/1/s/artifacts/bin/UITest.Appium/Debug/net10.0/UITest.Appium.dll
UITest.Analyzers -> /home/vsts/work/1/s/artifacts/bin/UITest.Analyzers/Debug/netstandard2.0/UITest.Analyzers.dll
Controls.TestCases.Android.Tests -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
Test run for /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll (.NETCoreApp,Version=v10.0)
VSTest version 18.0.1 (x64)
Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
/home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0)
[xUnit.net 00:00:00.12] Discovering: Controls.TestCases.Android.Tests
[xUnit.net 00:00:00.50] Discovered: Controls.TestCases.Android.Tests
NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 04/24/2026 14:40:58 FixtureSetup for Issue31799(Android)
>>>>> 04/24/2026 14:41:01 VerifyTabbedPageDoesNotHaveMultipleTabsSelected Start
>>>>> 04/24/2026 14:41:10 VerifyTabbedPageDoesNotHaveMultipleTabsSelected Stop
Passed VerifyTabbedPageDoesNotHaveMultipleTabsSelected [9 s]
NUnit Adapter 4.5.0.0: Test execution complete
Test Run Successful.
Total tests: 1
Passed: 1
Total time: 39.1583 Seconds
🟢 With fix — 🖥️ Issue31799: PASS ✅ · 557s
Determining projects to restore...
All projects are up-to-date for restore.
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Graphics -> /home/vsts/work/1/s/artifacts/bin/Graphics/Debug/net10.0-android36.0/Microsoft.Maui.Graphics.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Essentials -> /home/vsts/work/1/s/artifacts/bin/Essentials/Debug/net10.0-android36.0/Microsoft.Maui.Essentials.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Core -> /home/vsts/work/1/s/artifacts/bin/Core/Debug/net10.0-android36.0/Microsoft.Maui.dll
Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Maps -> /home/vsts/work/1/s/artifacts/bin/Maps/Debug/net10.0-android36.0/Microsoft.Maui.Maps.dll
Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.Core/Debug/net10.0-android36.0/Microsoft.Maui.Controls.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Foldable -> /home/vsts/work/1/s/artifacts/bin/Controls.Foldable/Debug/net10.0-android36.0/Microsoft.Maui.Controls.Foldable.dll
Microsoft.AspNetCore.Components.WebView.Maui -> /home/vsts/work/1/s/artifacts/bin/Microsoft.AspNetCore.Components.WebView.Maui/Debug/net10.0-android36.0/Microsoft.AspNetCore.Components.WebView.Maui.dll
Controls.Xaml -> /home/vsts/work/1/s/artifacts/bin/Controls.Xaml/Debug/net10.0-android36.0/Microsoft.Maui.Controls.Xaml.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.Maps/Debug/net10.0-android36.0/Microsoft.Maui.Controls.Maps.dll
Controls.TestCases.HostApp -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Controls.TestCases.HostApp.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Graphics -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Graphics.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Essentials -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Essentials.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Core -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.dll
Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Maps.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Xaml -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Xaml.dll
Microsoft.AspNetCore.Components.WebView.Maui -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.AspNetCore.Components.WebView.Maui.dll
Controls.Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Maps.dll
Controls.Foldable -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Foldable.dll
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:07:11.50
Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
Broadcast completed: result=0
Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
Broadcast completed: result=0
Determining projects to restore...
All projects are up-to-date for restore.
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Graphics -> /home/vsts/work/1/s/artifacts/bin/Graphics/Debug/net10.0/Microsoft.Maui.Graphics.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Essentials -> /home/vsts/work/1/s/artifacts/bin/Essentials/Debug/net10.0/Microsoft.Maui.Essentials.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Core -> /home/vsts/work/1/s/artifacts/bin/Core/Debug/net10.0/Microsoft.Maui.dll
Controls.CustomAttributes -> /home/vsts/work/1/s/artifacts/bin/Controls.CustomAttributes/Debug/net10.0/Controls.CustomAttributes.dll
Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.13928745
Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.Core/Debug/net10.0/Microsoft.Maui.Controls.dll
UITest.Core -> /home/vsts/work/1/s/artifacts/bin/UITest.Core/Debug/net10.0/UITest.Core.dll
UITest.Appium -> /home/vsts/work/1/s/artifacts/bin/UITest.Appium/Debug/net10.0/UITest.Appium.dll
UITest.NUnit -> /home/vsts/work/1/s/artifacts/bin/UITest.NUnit/Debug/net10.0/UITest.NUnit.dll
VisualTestUtils -> /home/vsts/work/1/s/artifacts/bin/VisualTestUtils/Debug/netstandard2.0/VisualTestUtils.dll
VisualTestUtils.MagickNet -> /home/vsts/work/1/s/artifacts/bin/VisualTestUtils.MagickNet/Debug/netstandard2.0/VisualTestUtils.MagickNet.dll
UITest.Analyzers -> /home/vsts/work/1/s/artifacts/bin/UITest.Analyzers/Debug/netstandard2.0/UITest.Analyzers.dll
Controls.TestCases.Android.Tests -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
Test run for /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll (.NETCoreApp,Version=v10.0)
VSTest version 18.0.1 (x64)
Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
/home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0)
[xUnit.net 00:00:00.12] Discovering: Controls.TestCases.Android.Tests
[xUnit.net 00:00:00.33] Discovered: Controls.TestCases.Android.Tests
NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 04/24/2026 14:50:16 FixtureSetup for Issue31799(Android)
>>>>> 04/24/2026 14:50:19 VerifyTabbedPageDoesNotHaveMultipleTabsSelected Start
>>>>> 04/24/2026 14:50:29 VerifyTabbedPageDoesNotHaveMultipleTabsSelected Stop
Passed VerifyTabbedPageDoesNotHaveMultipleTabsSelected [9 s]
NUnit Adapter 4.5.0.0: Test execution complete
Test Run Successful.
Total tests: 1
Passed: 1
Total time: 26.0709 Seconds
⚠️ Issues found
- ❌ Issue31799 PASSED without fix (should fail) — tests don't catch the bug
📁 Fix files reverted (1 files)
src/Controls/src/Core/TabbedPage/TabbedPage.Windows.cs
🧪 UI Tests — Category Detection
Detected UI test categories: TabbedPage
🔍 Pre-Flight — Context & Validation
Issue: #31799 - WinUI TabbedPage can have multiple tabs selected
PR: #33312 - [Windows] Fix for Multiple Tabs Being Selected in WinUI TabbedPage
Platforms Affected: Windows (fix), Android/iOS (test snapshots only)
Files Changed: 1 implementation, 2 test (+ 5 snapshot PNG files)
Key Findings
- Root cause:
NavigationView.SelectedItemis not cleared when a TabbedPage disappears, causing the previous TabbedPage's tab indicator to persist as a "ghost" when another TabbedPage is pushed on the navigation stack - Fix is two-sided: (1) clear
SelectedItemonDisappearing, (2) restore it onAppearingby finding the item matchingCurrentPageinMenuItemsSource - Windows-only code change — other platforms not affected at implementation level
- Test uses
#if TEST_FAILS_ON_CATALYST(runs on Android, iOS, Windows but NOT MacCatalyst — linked issue [MacOS 26] 'Search Recipe' and 'My Recipe' tab are missing on MacOS Tahoe 26.1 #32900) - Gate failed — CI failures on WinUI and iOS TabbedPage UI test jobs covering the new
Issue31799test - The test combines two scenarios (forward push + back-navigation) in one method; should be split per MAUI conventions
TapTabis a valid extension method in HelperExtensions.cs — prior copilot suggestion to change it toApp.Tapwas incorrect
Code Review Summary
Verdict: NEEDS_CHANGES
Confidence: high
Errors: 1 | Warnings: 1 | Suggestions: 2
Key code review findings:
- ❌ CI failures on WinUI + iOS TabbedPage UI test jobs — new
Issue31799test is causing them (src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31799.cs) ⚠️ Single test method covers two distinct scenarios (push vs. back-navigate); split per MAUI convention (src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31799.cs:18)- 💡 Missing trailing newline in
src/Controls/tests/TestCases.HostApp/Issues/Issue31799.cs - 💡 Redundant
SelectedItem = nullinOnHandlerDisconnected(line ~172) — already clears, then callsOnTabbedPageDisappearingwhich also clears (src/Controls/src/Core/TabbedPage/TabbedPage.Windows.cs)
Fix Candidates
| # | Source | Approach | Test Result | Files Changed | Notes |
|---|---|---|---|---|---|
| PR | PR #33312 | Clear SelectedItem=null on Disappearing; restore from MenuItemsSource matching CurrentPage on Appearing |
❌ Gate FAILED | TabbedPage.Windows.cs |
Windows-only impl fix; gate failed on Android test |
🔬 Code Review — Deep Analysis
Code Review — PR #33312
Independent Assessment
What this changes: In TabbedPage.Windows.cs, two event handlers are modified:
OnTabbedPageDisappearingnow explicitly sets_navigationView.SelectedItem = nullbefore changing the pane display mode.OnTabbedPageAppearingnow iteratesMenuItemsSourceto find the item matchingCurrentPageand restores it asSelectedItemwhen the page re-appears.
A new UI test (Issue31799) and its snapshot baselines are added for Android, iOS, and Windows.
Inferred motivation: When a second TabbedPage is pushed onto a NavigationPage inside a FlyoutPage, both TabbedPages share the Window's visual layer. The departing TabbedPage's NavigationView retains its selected item visually. On navigation back, the returning TabbedPage has no mechanism to re-assert its selection. The fix adds symmetrical "clear on leave / restore on return" semantics.
Reconciliation with PR Narrative
Author claims: The root cause is that SelectedItem is not cleared on disappear, causing the previous TabbedPage's tab indicator to persist. Fix: set SelectedItem = null in OnTabbedPageDisappearing.
Agreement/disagreement:
- Partial agreement. The null-clear in
Disappearingaddresses the "ghost selection" on the departing page. But the author's description omits the equally important change — the selection restore inOnTabbedPageAppearing. Without the restore, navigating back would leave the original TabbedPage with no selected tab at all. Both halves of the fix are needed. - The root cause analysis is correct for the Windows-only platform file change. Android, iOS, and macOS are unaffected at the code level; their snapshots are included just for test coverage baseline purposes.
Findings
❌ Error — CI failures on TabbedPage UI tests (WinUI + iOS)
Two required CI checks are failing:
maui-pr-uitests (WinUI UITests Controls TabbedPage,TableView,...)— failmaui-pr-uitests (iOS UITests Mono Controls (vlatest) TabbedPage,...)— fail
This PR adds Issue31799 to the TabbedPage test suite and those jobs now execute it. The failures must be investigated and resolved before merge. Most likely candidates:
- WinUI:
App.TapTab("Unselected Tab")with defaultisTopTab: falsemay not interact correctly with a WindowsNavigationViewPaneDisplayMode.TopTabbedPage embedded in aFlyoutPage. The Appium accessibility tree layout for this nested configuration may require a different interaction path. - iOS: The test compiles for iOS via
#if TEST_FAILS_ON_CATALYST(excludes only MacCatalyst). Timing issues in theGoBackButtontap orWaitForElementafter pop could cause CI failure.
src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31799.cs — failing CI must be addressed.
⚠️ Warning — Single test method covers two distinct navigation scenarios
VerifyTabbedPageDoesNotHaveMultipleTabsSelected combines two logically independent verifications:
- After pushing the new TabbedPage: verifies "new TabbedPage shows only one selected tab"
- After popping back: verifies "original TabbedPage restores selection correctly"
Per MAUI convention: "When a test covers two different behaviors, split into separate test methods." If the restore-on-back half fails in CI, the failure message won't distinguish it from the forward-navigation half without reading the screenshot name.
💡 Suggestion — Missing trailing newline in HostApp file
src/Controls/tests/TestCases.HostApp/Issues/Issue31799.cs is missing a trailing newline (diff shows \ No newline at end of file).
💡 Suggestion — Redundant SelectedItem = null in disconnect path
OnHandlerDisconnected (line 172) already sets _navigationView.SelectedItem = null and then calls OnTabbedPageDisappearing (line 176), which now also sets SelectedItem = null. The redundancy is harmless (SelectionChanged is already unsubscribed by line 173), but slightly confusing to read.
Devil's Advocate
On SelectionChanged side-effect in OnTabbedPageAppearing: Setting _navigationView.SelectedItem = item fires SelectionChanged → OnSelectedMenuItemChanged → NavigateToPage. The if (_displayedPage == page) return; guard at line ~281 prevents redundant frame navigation if the page was already displayed. No issue.
On "shared NavigationView" concern: When TabbedPages are nested inside FlyoutPage > NavigationPage, FindParentOfType<FlyoutPage>() != null is true, so CreatePlatformView creates a local new MauiNavigationView() per TabbedPage. They are NOT sharing the same _navigationView instance. The fix is sound.
On App.TapTab vs App.Tap: Prior copilot reviewer suggestion to replace TapTab with Tap is incorrect. TapTab is a well-established extension method in HelperExtensions.cs that handles platform-specific differences (e.g. Android uppercases tab names). Keep TapTab.
Verdict: NEEDS_CHANGES
Confidence: high
Summary: The fix logic is correct — clearing SelectedItem on disappear and restoring it on appear is the right two-sided fix for the ghost-selection bug. However, two CI jobs for TabbedPage (WinUI and iOS) are currently failing and directly cover this PR's new test code. Those failures must be resolved before merge. Splitting the test into two separate methods would also align with MAUI testing conventions.
🔧 Fix — Analysis & Comparison
Fix Candidates
| # | Source | Approach | Test Result | Files Changed | Notes |
|---|---|---|---|---|---|
| 1 | try-fix (claude-opus-4.6) | ViewModel IsSelected management via NavigationViewItemViewModel.IsSelected (data-level) + enhanced MapCurrentPage to sync selection + split test methods + make test #if WINDOWS only |
TabbedPage.Windows.cs, Issue31799.cs (tests) |
Sound approach; Windows CI needed to validate | |
| 2 | try-fix (claude-sonnet-4.6) | Subscribe to parent NavigationPage.Pushed/Popped events in OnHandlerConnected to clear/restore SelectedItem only when navigation stack changes (more surgical than Appearing/Disappearing) + test changed to #if WINDOWS + split into two test methods |
TabbedPage.Windows.cs, Issue31799.cs (tests) |
More targeted approach; Windows CI needed | |
| 3 | try-fix (gpt-5.3-codex) | Test-only fix: change #if TEST_FAILS_ON_CATALYST to #if WINDOWS, split into 2 separate test methods (VerifyPushedTabbedPageHasSingleSelectedTab + VerifyOriginalTabbedPageRestoresSelectionAfterBackNavigation), extract NavigateToPushedTabbedPage() helper |
#if WINDOWS means 0 tests on Android, can't validate on Android |
Issue31799.cs (tests only) |
Addresses ❌ CI failure + |
| 4 | try-fix (gpt-5.4, gemini unavailable) | Clear SelectedItem via NavigationPage.CurrentPage change event; restore via Handler.UpdateValue(nameof(CurrentPage)) to reuse MapCurrentPage + test to #if WINDOWS + split tests | TabbedPage.Windows.cs, Issue31799.cs |
Uses existing MapCurrentPage dispatch path | |
| PR | PR #33312 | Clear SelectedItem=null on Disappearing; restore from MenuItemsSource matching CurrentPage on Appearing |
❌ Gate FAILED (Android) | TabbedPage.Windows.cs |
Windows fix; gate can't verify on Android |
Cross-Pollination
| Model | Round | New Ideas? | Details |
|---|---|---|---|
| claude-opus-4.6 | 2 | No | All approaches blocked — no cross-platform abstraction for WinUI tab visual selection state. Bug is pure WinUI rendering artifact; Android gate cannot validate Windows-native fix. NO NEW IDEAS. |
Exhausted: Yes
Selected Fix: PR's fix (clear SelectedItem=null on Disappearing + restore from MenuItemsSource on Appearing in TabbedPage.Windows.cs) — combined with test change to #if WINDOWS (Attempt 3's test improvement) as the recommended improvement.
Note: All try-fix attempts were BLOCKED on Android because the bug is Windows-specific (WinUI NavigationView visual rendering) and the specified testing platform is Android. The PR's implementation fix is correct; the test needs to be scoped to #if WINDOWS to resolve gate failures on Android and iOS.
📋 Report — Final Recommendation
⚠️ Final Recommendation: REQUEST CHANGES
Phase Status
| Phase | Status | Notes |
|---|---|---|
| Pre-Flight | ✅ COMPLETE | Issue #31799, PR #33312, 1 impl file + 2 test files |
| Code Review | NEEDS_CHANGES (high) | 1 error, 1 warning, 2 suggestions |
| Gate | ❌ FAILED | android — tests did NOT behave as expected |
| Try-Fix | ✅ COMPLETE | 4 attempts, 0 passing (all BLOCKED — Windows-only bug cannot be validated on Android) |
| Report | ✅ COMPLETE |
Code Review Impact on Try-Fix
The code review ❌ Error finding (CI failures on WinUI + iOS TabbedPage jobs from the new test) directly drove all 4 try-fix models to address the test guard. Every model independently converged on changing #if TEST_FAILS_ON_CATALYST to #if WINDOWS as the primary fix for CI. The
Summary
PR #33312 fixes a Windows-specific bug where navigating between two TabbedPages inside a FlyoutPage > NavigationPage stack causes "ghost" tab selection indicators. The implementation fix in TabbedPage.Windows.cs is correct and well-reasoned. However, the test is guarded with #if TEST_FAILS_ON_CATALYST (runs on Android and iOS) instead of #if WINDOWS, causing the test to run on platforms where the bug doesn't exist — leading to CI failures and gate failures on Android. All 4 independent try-fix models confirm the test needs to be #if WINDOWS-only.
Root Cause
On Windows, when a second TabbedPage is pushed onto a NavigationPage inside a FlyoutPage, the first TabbedPage's MauiNavigationView.SelectedItem is not cleared when it disappears. The WinUI NavigationView retains the visual selection indicator from the first page while the second is displayed. On navigation back, the original page has no mechanism to re-assert its selection. This is a Windows/WinUI-only rendering artifact — no analogous issue exists on Android or iOS.
Fix Quality
The implementation fix is correct:
OnTabbedPageDisappearing: Setting_navigationView.SelectedItem = nullclears the ghost selection. ✅OnTabbedPageAppearing: IteratingMenuItemsSourceto restoreSelectedItem = item where item.Data == CurrentPagecorrectly re-establishes selection. TheSelectionChanged → NavigateToPagepath is guarded by_displayedPage == pagecheck, preventing redundant navigation. ✅
Required changes before merge:
- Change
#if TEST_FAILS_ON_CATALYSTto#if WINDOWSinsrc/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31799.cs— this prevents the test from running on iOS/Android where the bug doesn't exist, resolving CI failures. - Split
VerifyTabbedPageDoesNotHaveMultipleTabsSelected()into two separate test methods per MAUI convention:VerifyPushedTabbedPageHasSingleSelectedTab(forward push scenario)VerifyOriginalTabbedPageRestoresSelectionAfterBackNavigation(back-navigation restore scenario)
- Add trailing newline to
src/Controls/tests/TestCases.HostApp/Issues/Issue31799.cs.
The Windows-specific snapshot is sufficient — Android and iOS snapshots in the PR are unnecessary since the test won't run on those platforms after the guard change.
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Some tabbed page uitests are failing - could you please verify?
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@kubaflo, I reviewed the failing test cases, and my test VerifyTabbedPageDoesNotHaveMultipleTabsSelected failed because the baseline snapshot had not been added. I have now added it. |
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…33312) <!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! ### Issue Details - WinUI TabbedPage can have multiple tabs selected. ### Root Cause - The NavigationView's selected item is not cleared when the TabbedPage disappears, causing the selected indicator from the previous page to remain visible. ### Description of Change - Updated OnTabbedPageDisappearing in TabbedPage.Windows.cs to explicitly set _navigationView.SelectedItem to null when the tabbed page disappears, preventing multiple tabs from appearing selected. ### Issues Fixed Fixes #31799 ### Validated the behaviour in the following platforms - [x] Windows - [x] Android - [x] iOS - [x] Mac ### Output | Before | After | |----------|----------| | <img src="https://github.com/user-attachments/assets/4cf56476-e928-4e6a-8866-cebe61fe9ad8"> | <img src="https://github.com/user-attachments/assets/91fa8b28-2ef7-42ea-8602-721a6aef8275"> |
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…33312) <!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! ### Issue Details - WinUI TabbedPage can have multiple tabs selected. ### Root Cause - The NavigationView's selected item is not cleared when the TabbedPage disappears, causing the selected indicator from the previous page to remain visible. ### Description of Change - Updated OnTabbedPageDisappearing in TabbedPage.Windows.cs to explicitly set _navigationView.SelectedItem to null when the tabbed page disappears, preventing multiple tabs from appearing selected. ### Issues Fixed Fixes #31799 ### Validated the behaviour in the following platforms - [x] Windows - [x] Android - [x] iOS - [x] Mac ### Output | Before | After | |----------|----------| | <img src="https://github.com/user-attachments/assets/4cf56476-e928-4e6a-8866-cebe61fe9ad8"> | <img src="https://github.com/user-attachments/assets/91fa8b28-2ef7-42ea-8602-721a6aef8275"> |
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…33312) <!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! ### Issue Details - WinUI TabbedPage can have multiple tabs selected. ### Root Cause - The NavigationView's selected item is not cleared when the TabbedPage disappears, causing the selected indicator from the previous page to remain visible. ### Description of Change - Updated OnTabbedPageDisappearing in TabbedPage.Windows.cs to explicitly set _navigationView.SelectedItem to null when the tabbed page disappears, preventing multiple tabs from appearing selected. ### Issues Fixed Fixes #31799 ### Validated the behaviour in the following platforms - [x] Windows - [x] Android - [x] iOS - [x] Mac ### Output | Before | After | |----------|----------| | <img src="https://github.com/user-attachments/assets/4cf56476-e928-4e6a-8866-cebe61fe9ad8"> | <img src="https://github.com/user-attachments/assets/91fa8b28-2ef7-42ea-8602-721a6aef8275"> |
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…33312) <!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! ### Issue Details - WinUI TabbedPage can have multiple tabs selected. ### Root Cause - The NavigationView's selected item is not cleared when the TabbedPage disappears, causing the selected indicator from the previous page to remain visible. ### Description of Change - Updated OnTabbedPageDisappearing in TabbedPage.Windows.cs to explicitly set _navigationView.SelectedItem to null when the tabbed page disappears, preventing multiple tabs from appearing selected. ### Issues Fixed Fixes #31799 ### Validated the behaviour in the following platforms - [x] Windows - [x] Android - [x] iOS - [x] Mac ### Output | Before | After | |----------|----------| | <img src="https://github.com/user-attachments/assets/4cf56476-e928-4e6a-8866-cebe61fe9ad8"> | <img src="https://github.com/user-attachments/assets/91fa8b28-2ef7-42ea-8602-721a6aef8275"> |
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## What's Coming .NET MAUI inflight/candidate introduces significant improvements across all platforms with focus on quality, performance, and developer experience. This release includes 85 commits with various improvements, bug fixes, and enhancements. ## Button - [Android, iOS] Button: Fix VisualState properties not restored when leaving custom state by @BagavathiPerumal in #33346 <details> <summary>🔧 Fixes</summary> - [Button VisualStates do not work](#19690) </details> ## CollectionView - Fix CollectionView grid spacing updates for first row and column by @KarthikRajaKalaimani in #34527 <details> <summary>🔧 Fixes</summary> - [[MAUI] I2_Vertical grid for horizontal Item Spacing and Vertical Item Spacing - horizontally updating the spacing only applies to the second column](#34257) </details> - CarouselView: Fix cascading PositionChanged/CurrentItemChanged events on collection update by @praveenkumarkarunanithi in #31275 <details> <summary>🔧 Fixes</summary> - [[Windows] CurrentItemChangedEventArgs and PositionChangedEventArgs Not Working Properly in CarouselView](#29529) </details> - [Windows] Fixed ItemSpacing doesn't work in Carousel View by @SubhikshaSf4851 in #30014 <details> <summary>🔧 Fixes</summary> - [ItemSpacing on CarouselView is not applied on Windows.](#29772) </details> - Fix CollectionView not scrolling to top on iOS status bar tap by @jfversluis in #34687 <details> <summary>🔧 Fixes</summary> - [[iOS] UICollectionView ScrollToTop does not work](#19866) </details> - [iOS] Fixed CollectionView Scroll Jitter for TextType HTML Labels by @SubhikshaSf4851 in #34383 <details> <summary>🔧 Fixes</summary> - [CollectionView scrolling is jittery when ItemTemplate contains Label with TextType="Html" in .NET 10](#33065) </details> - Fix CollectionView Header is not visible when ItemsSource is not set and an EmptyView is set in iOS, Mac platform by @KarthikRajaKalaimani in #34989 <details> <summary>🔧 Fixes</summary> - [CollectionView Header is not visible when ItemsSource is not set and EmptyView is set in iOS, Mac platform](#34897) </details> - [Android] Fix CollectionView EmptyView not displayed correctly by @KarthikRajaKalaimani in #34956 <details> <summary>🔧 Fixes</summary> - [[Android] CollectionView - EmptyView not displayed correctly](#34861) </details> - [iOS] Fix CollectionView ScrollOffset not resetting when ItemsSource changes by @SyedAbdulAzeemSF4852 in #34488 <details> <summary>🔧 Fixes</summary> - [[IOS] CollectionView ScrollOffset does not reset when the ItemSource is changed in iOS.](#26366) - [Re-enable Issue7993 test on iOS/Catalyst - CollectionView scroll position not reset when updating ItemsSource](#33500) </details> - [Revert] [iOS] Fixed CollectionView Scroll Jitter for TextType HTML Labels by @SubhikshaSf4851 in #35341 ## Core Lifecycle - [Android] Fix NRE in ContainerView when Android Context is null during lifecycle transition by @rmarinho in #34901 <details> <summary>🔧 Fixes</summary> - [[Android] NullReferenceException in NavigationRootManager.Connect when mapping Window content](#34900) </details> ## DateTimePicker - [Android] Fix for TimePicker Dialog doesn't update the layout when rotating the device with dialog open by @HarishwaranVijayakumar in #31910 <details> <summary>🔧 Fixes</summary> - [[Android] TimePicker Dialog doesn't update the layout when rotating the device with dialog open](#31658) </details> - [Android, iOS] Fixed TimePicker FlowDirection Not Applied Across Platforms by @Dhivya-SF4094 in #30369 <details> <summary>🔧 Fixes</summary> - [TimePicker FlowDirection Not Working on All Platforms](#30192) </details> - [Windows] Fixed TimePicker CharacterSpacing issue by @SubhikshaSf4851 in #30533 <details> <summary>🔧 Fixes</summary> - [[Windows] TimePicker CharacterSpacing Property Not Working on Windows](#30199) </details> - [MacCatalyst] Fix DatePicker Opened/Closed events not being raised by @SubhikshaSf4851 in #34970 <details> <summary>🔧 Fixes</summary> - [[MacCatalyst] DatePicker Opened and Closed events are not raised on Mac platform](#34848) </details> ## Dialogalert - [Android] Fix AlertDialog, ActionSheet, and Prompt render with Material 2 styles when Material 3 is enabled by @HarishwaranVijayakumar in #35121 <details> <summary>🔧 Fixes</summary> - [[Android] AlertDialog, ActionSheet, and Prompt render with Material 2 styles when Material 3 is enabled](#35119) </details> ## Docs - docs: Add UITesting-Guide, ReleasePlanning, and ReleaseProcess to docs/README.md index by @PureWeen in #35195 - docs: Fix hardcoded path and add library overview in Essentials.AI README by @PureWeen in #35194 - docs: Update branch reference from net10.0 to net11.0 in DEVELOPMENT.md by @PureWeen in #35193 ## Drawing - Fix Path Rendering Issue Inside StackLayout When Margin Is Set by @Shalini-Ashokan in #28071 <details> <summary>🔧 Fixes</summary> - [Path does not render if it has Margin](#13801) </details> - Fixed FlowDirection property not working on Drawable control and GraphicsView by @Dhivya-SF4094 in #34557 <details> <summary>🔧 Fixes</summary> - [[Android, Windows, iOS, macOS] FlowDirection property not working on BoxView Control](#34402) </details> - [iOS & Mac] Fix image tile misalignment in GraphicsView ImagePaint by @SubhikshaSf4851 in #34935 <details> <summary>🔧 Fixes</summary> - [[iOS] Image resized with ResizeMode.Fit is not rendered correctly in GraphicsView](#34755) </details> - Fix Shadow does not honour Styles by @KarthikRajaKalaimani in #35081 <details> <summary>🔧 Fixes</summary> - [Shadow does not honour Styles](#19560) </details> ## Entry - [iOS/macCatalyst] Fix Entry and Editor BackgroundColor reset when set to null by @Shalini-Ashokan in #34741 <details> <summary>🔧 Fixes</summary> - [[iOS, Maccatalyst] Entry & Editor BackgroundColor not reset to Null](#34611) </details> - [Windows] Fix password Entry crash when setting text on empty field by @praveenkumarkarunanithi in #33891 <details> <summary>🔧 Fixes</summary> - [[WinUI] Password Obfuscation causes unhandled crash](#33334) </details> ## Essentials - [Essentials] Use mean sea level altitude on Android API 34+ by @KitKeen in #35097 <details> <summary>🔧 Fixes</summary> - [Add support for MslAltitudeMeters in Essentials Geolocation on Android](#27554) </details> ## Flyout - Fixed Flyout Not Displayed on Android When FlyoutWidth Is Set Only for Desktop via OnIdiom by @NanthiniMahalingam in #29028 <details> <summary>🔧 Fixes</summary> - [[Android] FlyoutWidth with OnIdiom shows no flyout](#13243) </details> - Revert "[Windows] Fix Flyout/Locked mode header collapse regression causing UI test failures on candidate branch" by @kubaflo in #35339 - Revert "Revert "[Windows] Fix Flyout/Locked mode header collapse regression causing UI test failures on candidate branch"" by @kubaflo in #35342 ## Flyoutpage - Fix [Android] Title of FlyOutPage is not updating anymore after showing a NonFlyOutPage by @KarthikRajaKalaimani in #34839 <details> <summary>🔧 Fixes</summary> - [[Android] Title of FlyOutPage is not updating anymore after showing a NonFlyOutPage](#33615) </details> ## Label - [iOS] Fix span Tap gesture on wrapped Label lines in iOS 26+ by @SubhikshaSf4851 in #34640 <details> <summary>🔧 Fixes</summary> - [[iOS]Span TapGestureRecognizer does not work on the second line of the span, if the span is wrapped to the next line](#34504) </details> ## Layout - Fixed Stacklayout is not rendered when clip is applied and StackLayout placed child to the Border control in iOS/ Mac platform by @KarthikRajaKalaimani in #33330 <details> <summary>🔧 Fixes</summary> - [[Mac/iOS] StackLayout fails to render content while applying Clip, and the layout is placed inside a Border with Background in .NET MAUI](#33241) </details> ## Map - Fix Changing Location on a Pin does nothing by @NirmalKumarYuvaraj in #30201 <details> <summary>🔧 Fixes</summary> - [[Maps] [Regression from Xamarin.Forms.Maps] Changing Location on a Pin does nothing](#12916) </details> ## Mediapicker - [iOS] Fix HEIC images picked via PickPhotosAsync not displayed by @HarishwaranVijayakumar in #34954 <details> <summary>🔧 Fixes</summary> - [[iOS] [Regression] HEIC images picked via PickPhotosAsync not displayed](#34953) </details> - [Android] Fix MediaPicker.PickPhotosAsync UnauthorizedAccessException on API 28 and below by @HarishwaranVijayakumar in #34981 <details> <summary>🔧 Fixes</summary> - [MediaPicker.PickPhotos fails to modify image, tries to load original source, fails to load source on Android 9.0](#34889) </details> ## Pages - [iOS] Fix ContentPage with ToolbarItem Clicked event leaks when presented as modal page by @devanathan-vaithiyanathan in #35009 <details> <summary>🔧 Fixes</summary> - [ContentPage with ToolbarItem Clicked event leaks when presented as modal page](#34892) </details> ## Platform - [Android] Fix OnBackButtonPressed not invoked for Shell by @Dhivya-SF4094 in #35150 <details> <summary>🔧 Fixes</summary> - [On Screen Back Button Does Not Fire OnBackButtonPressed in Android](#9095) </details> ## RadioButton - Fix RadioButtonGroup not working with ContentView by @Dhivya-SF4094 in #34781 <details> <summary>🔧 Fixes</summary> - [RadioButtonGroup not working with ContentView](#34759) </details> - [Windows] Fix for RadioButton BorderColor and BorderWidth not updated at runtime by @SyedAbdulAzeemSF4852 in #28335 <details> <summary>🔧 Fixes</summary> - [RadioButton Border color not working for focused visual state](#15806) </details> - [iOS] Fix RadioButton BackgroundColor bleeding outside CornerRadius by @SyedAbdulAzeemSF4852 in #34844 <details> <summary>🔧 Fixes</summary> - [[iOS] RadioButton BackgroundColor bleeds outside CornerRadius](#34842) </details> ## SafeArea - [iOS] Fix stale bottom safe area after changing SafeAreaEdges with keyboard open by @praveenkumarkarunanithi in #35083 <details> <summary>🔧 Fixes</summary> - [[iOS] ContentPage bottom has white space after changing SafeAreaEdges while keyboard is open](#34846) </details> ## ScrollView - [Windows] Fix Preserve ScrollView offsets when Orientation changes to Neither by @SubhikshaSf4851 in #34827 <details> <summary>🔧 Fixes</summary> - [[Windows] ScrollView offsets do not preserve when Orientation changes to Neither](#34671) </details> ## Searchbar - [iOS] Fix SearchBar unexpected left margin in iPad windowed mode on 26 Version by @SubhikshaSf4851 in #34704 <details> <summary>🔧 Fixes</summary> - [in iPad windowed mode SearchBar adds left margin equivaltent to SafeAreaInsets when placed inside grid](#34551) </details> ## Shell - [Windows] Fix for Shell.FlyoutBehavior="Flyout" forces the title height space above the tab bar even if the page title is empty by @BagavathiPerumal in #30382 <details> <summary>🔧 Fixes</summary> - [(Windows) Shell.FlyoutBehavior="Flyout" forces the title height space above the tab bar even if the page title is empty](#30254) </details> - Fix Shell flyout items scrolling behind FlyoutHeader on iOS by @Qythyx in #34936 <details> <summary>🔧 Fixes</summary> - [Shell flyout items scroll behind FlyoutHeader on iOS](#34925) </details> - [iOS, Mac] Fix Shell.CurrentState.Location stale in OnNavigated after GoToAsync by @Vignesh-SF3580 in #34880 <details> <summary>🔧 Fixes</summary> - [Shell.OnNavigated not called for route navigation](#34662) </details> - [iOS26]Fix BackButtonBehavior_IsEnabled_False_BackButtonDoesNotNavigate UITest fails by @devanathan-vaithiyanathan in #34890 <details> <summary>🔧 Fixes</summary> - [[iOS 26] BackButtonBehavior_IsEnabled_False_BackButtonDoesNotNavigate test fails with TimeoutException](#34771) </details> - [iOS] Fix Shell page memory leak when using TitleView with x:Name by @Shalini-Ashokan in #35082 <details> <summary>🔧 Fixes</summary> - [[iOS] Title view memory leak](#34975) </details> - [Material 3] Fix Material 2 color flash in AppBar when switching tabs for the first time by @Dhivya-SF4094 in #35117 <details> <summary>🔧 Fixes</summary> - [Material 3: AppBar briefly displays Material 2 colors when switching tabs for the first time](#35116) </details> - [Android] Fix Shell/TabbedPage "More" BottomSheet uses hard-coded M2 colors when Material3 is enabled by @HarishwaranVijayakumar in #35129 <details> <summary>🔧 Fixes</summary> - [[Android] Shell/TabbedPage "More" BottomSheet uses hard-coded M2 colors when Material3 is enabled](#35127) </details> - [Android] Shell: Fix top-tab unselected text visibility in Material 3 light theme by @SyedAbdulAzeemSF4852 in #35128 <details> <summary>🔧 Fixes</summary> - [[Android] Shell top-tab unselected text appears too faint in Material 3 light theme](#35125) </details> - Fix Shell.Items.Clear() memory leak by disconnecting child handlers on removal (#34898) by @Shalini-Ashokan in #35031 <details> <summary>🔧 Fixes</summary> - [Shell.Items.Clear() does not disconnect handlers correctly](#34898) </details> - [iOS&Mac] Fix Shell SearchHandler Query update on Initial load by @SubhikshaSf4851 in #35008 <details> <summary>🔧 Fixes</summary> - [[iOS&Mac] Shell SearchHandler Query not shown in search bar on initial load](#35005) </details> ## SwipeView - [iOS,MacCatalyst] Fix for SwipeView.Open() throwing an ArgumentException on the second programmatic call by @BagavathiPerumal in #34982 <details> <summary>🔧 Fixes</summary> - [[net 11.0][iOS,MacCatalyst] SwipeView.Open() throws ArgumentException on second programmatic call](#34917) </details> - [Android/iOS] Fix SwipeItem visibility change causing double command execution in Execute mode by @praveenkumarkarunanithi in #35087 <details> <summary>🔧 Fixes</summary> - [Changing visibility on an SwipeItem causes multiple items to be executed](#7580) </details> ## Switch - [iOS] Fix Switch ThumbColor reset on iOS 26+ theme changes. by @Shalini-Ashokan in #33953 <details> <summary>🔧 Fixes</summary> - [Switch ThumbColor not Initialized Using VisualStateManager on iOS Device](#33783) - [I9-On macOS 26.2, the "Animate scroll" button is white by default on iOS and Maccatalyst platforms.](#33767) </details> ## TabbedPage - [Windows] TabbedPage: Refresh layout when NavigationView size changes by @BagavathiPerumal in #26217 <details> <summary>🔧 Fixes</summary> - [TabbedPage - ScrollView not allowing scrolling when it should](#26103) - [TabbedPage App on resize hides page bottom content](#11402) - [Grid overflows child ContentPage of parent TabbedPage on initial load and when resizing on Windows](#20028) </details> - [Android] Material 3 Fixed BottomNavigationView overflowing in Tabbed page by @NirmalKumarYuvaraj in #35064 <details> <summary>🔧 Fixes</summary> - [[Android] Material3 - TabbedPage bottom tabs overflowing the contents](#35063) </details> - [Windows] Fix for Multiple Tabs Being Selected in WinUI TabbedPage by @SyedAbdulAzeemSF4852 in #33312 <details> <summary>🔧 Fixes</summary> - [WinUI TabbedPage can have multiple tabs selected](#31799) </details> ## Theming - [iOS] Fix StaticResource Hot Reload crash on iOS by @StephaneDelcroix in #35020 <details> <summary>🔧 Fixes</summary> - [The maui app quit and no errors in error list after editing ResourceDictionary XAML file on iOS Simulator with MAUI SR6 10.0.60](#35018) </details> ## Toolbar - [Windows] Fix for CS1061 build error caused by missing HasMenuBarContent property in MauiToolbar by @BagavathiPerumal in #35040 ## Tooling - Fix VisualStateGroups duplicate name crash with implicit styles (#34716) by @StephaneDelcroix in #34719 <details> <summary>🔧 Fixes</summary> - [SourceGen: VisualStateManager.VisualStateGroups causes 'Names must be unique' at startup](#34716) </details> ## WebView - Refactor the HybridWebView and properly support complex parameters by @mattleibow in #32491 - [Android] Fix WebView scrolling inside ScrollView by @Shalini-Ashokan in #33133 <details> <summary>🔧 Fixes</summary> - [[Android] WebView's content does not scroll when placed inside a ScrollView](#32971) </details> <details> <summary>🔧 Infrastructure (1)</summary> - [Windows] Fix Narrator announcing ContentView children twice when Description is set by @praveenkumarkarunanithi in #33979 <details> <summary>🔧 Fixes</summary> - [[Windows] SemanticProperties.Description announced twice when set on focusable container cell (Label inside)](#33373) </details> </details> <details> <summary>🧪 Testing (14)</summary> - [Testing] SafeArea Feature Matrix Test Cases for ContentPage by @TamilarasanSF4853 in #34877 - [Windows] Fix CollectionView ScrollTo related test cases failed in CI by @HarishwaranVijayakumar in #34907 <details> <summary>🔧 Fixes</summary> - [[Testing][Windows]CollectionView ScrollTo related test cases failed in CI](#34772) </details> - [Testing] Fixed Build error on inflight/ candidate PR 35234 by @HarishKumarSF4517 in #35241 - Fix CI for ValidateKeyboardRuntime_SwitchContainerToSoftInput_WhileKeyboardOpen test failure in May 4th Candidate by @devanathan-vaithiyanathan in #35307 - [Windows] Fix Flyout/Locked mode header collapse regression causing UI test failures on candidate branch by @BagavathiPerumal in #35312 - [iOS/macCatalyst] [Candidate Fix] Editor shadow and theme regression caused by BackgroundColor reset on initial handler connection by @Shalini-Ashokan in #35343 - [Testing] Fixed UI test image failure in PR 35234 - [30/03/2026] Candidate - 1 by @HarishKumarSF4517 in #35325 - [iOS] Fix ShellFeatureMatrix test failures on candidate branch by @Vignesh-SF3580 in #35346 - [Windows] Fix Issue29529VerifyPreviousPositionOnInsert test failure on candidate branch by @praveenkumarkarunanithi in #35398 - [Android] [Candidate Fix] Shell: Fix handler disconnect timing to preserve WebView navigation and memory leak fix by @Shalini-Ashokan in #35417 - [Testing]Revert 'Fix Preserve ScrollView offsets when Orientation changes to Neither' by @TamilarasanSF4853 in #35412 - [Windows] Fix VerifyAllIndicatorDotsShowShadowsWhenIndicatorSize test failure on candidate branch by @praveenkumarkarunanithi in #35458 - [Testing] Fixed test failure in PR 35234 - [05/08/2026] Candidate by @TamilarasanSF4853 in #35362 - [Testing] Fixed test failure in PR 35234 - [05/04/2026] Candidate - 3 by @TamilarasanSF4853 in #35639 </details> <details> <summary>📦 Other (6)</summary> - [UIKit] Avoid useless measure invalidation propagation cycles by @albyrock87 in #33459 - BindableObject property access micro-optimizations by @albyrock87 in #33584 - Extract filename from DisplayName and add extension if missing by @mattleibow in #35050 - [core] Add keyed-DI screenshot extensibility for 3rd-party platform backends by @Redth in #35096 <details> <summary>🔧 Fixes</summary> - [`ViewExtensions.CaptureAsync(IView)` and `IPlatformScreenshot` need extensibility for third-party platform backends](#34266) </details> - Fix MainThread throwing on custom platform backends by @Redth in #35070 <details> <summary>🔧 Fixes</summary> - [`MainThread.BeginInvokeOnMainThread` throws on custom platform backends - Common UI-thread marshaling pattern crashes; `Dispatcher` works but isn't the documented/recommended path](#34101) </details> - Tests: Add 11 missing UnitConverters unit tests by @PureWeen in #35191 </details> <details> <summary>📝 Issue References</summary> Fixes #7580, Fixes #9095, Fixes #11402, Fixes #12916, Fixes #13243, Fixes #13801, Fixes #15806, Fixes #19560, Fixes #19690, Fixes #19866, Fixes #20028, Fixes #26103, Fixes #26366, Fixes #27554, Fixes #29529, Fixes #29772, Fixes #30192, Fixes #30199, Fixes #30254, Fixes #31658, Fixes #31799, Fixes #32971, Fixes #33065, Fixes #33241, Fixes #33334, Fixes #33373, Fixes #33500, Fixes #33615, Fixes #33767, Fixes #33783, Fixes #34101, Fixes #34257, Fixes #34266, Fixes #34402, Fixes #34504, Fixes #34551, Fixes #34611, Fixes #34662, Fixes #34671, Fixes #34716, Fixes #34755, Fixes #34759, Fixes #34771, Fixes #34772, Fixes #34842, Fixes #34846, Fixes #34848, Fixes #34861, Fixes #34889, Fixes #34892, Fixes #34897, Fixes #34898, Fixes #34900, Fixes #34917, Fixes #34925, Fixes #34953, Fixes #34975, Fixes #35005, Fixes #35018, Fixes #35063, Fixes #35116, Fixes #35119, Fixes #35125, Fixes #35127 </details> **Full Changelog**: main...inflight/candidate
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Issue Details
Root Cause
Description of Change
Issues Fixed
Fixes #31799
Validated the behaviour in the following platforms
Output